Graduate

Signed-off-by: Matt Strapp <matt@mattstrapp.net>

1 files changed, 134 insertions, 0 deletions

diff --git a/csci1913/Python/project1_strap012.py b/csci1913/Python/project1_strap012.py
new file mode 100644
index 0000000..c825359
--- /dev/null
+++ b/csci1913/Python/project1_strap012.py
@@ -0,0 +1,134 @@
+class Random:    
+    def __init__(self, seed):
+        self.sevenFive = 16807
+        self.twoThirtyone = 2147483647
+        self.newNum = seed
+
+    def next(self):
+        self.newNum = self.sevenFive*self.newNum % self.twoThirtyone
+        return self.newNum
+
+    def choose(self, limit):
+        return self.next()%limit
+
+
+
+class Rule:
+    def __init__(self, left, right):
+        self.left = left
+        self.right = right
+        self.count = 1
+
+    def __repr__(self):
+        string = str(self.count)
+        string += " "
+        string += str(self.left)
+        string += " -> "
+        for n in range (0, len(self.right)):
+            string += self.right[n]
+            string += " "
+        return string
+
+
+
+class Grammar:
+    def __init__(self, seed):
+        self.r = Random(seed)
+        self.dictionary = {}
+
+    def rule(self, left, right):
+        if left not in self.dictionary:
+            self.dictionary[left] = (Rule(left,right),)
+        else:
+            self.dictionary[left] += (Rule(left, right),)
+
+    def generate(self):
+        if 'Start' in self.dictionary:
+           return self.generating(('Start',))
+        else:
+            raise RuntimeError
+
+    def select(self, left):
+        rules = self.dictionary[left]
+        total = 0
+        c = 0
+        #Some of the loops are probably not needed
+        for m in range (0, len(rules)):
+            total += rules[m].count
+        index = self.r.choose(total)
+        for c in range (0, len(rules)):
+            index -= rules[c].count
+            if index <= 0:
+                break
+        chosen = rules[c]
+        for n in range (0, len(rules)):
+            if rules[n] is not chosen:
+                rules[n].count += 1
+        return chosen.right
+
+    def generating(self,strings):
+        result=''
+        for n in range (0, len(strings)):
+            if strings[n] not in self.dictionary:
+                result += strings[n]
+                result += " "
+            else:
+                result += self.generating(self.select(strings[n]))
+        return result
+
+
+
+
+G = Grammar(101)
+G.rule('Noun',   ('cat',))  # 01
+G.rule('Noun',   ('boy',))  # 02
+G.rule('Noun',   ('dog',))  # 03
+G.rule('Noun',   ('girl',))  # 04
+G.rule('Verb',   ('bit',))  # 05
+G.rule('Verb',   ('chased',))  # 06
+G.rule('Verb',   ('kissed',))  # 07
+G.rule('Phrase', ('the', 'Noun', 'Verb', 'the', 'Noun'))  # 08
+G.rule('Story',  ('Phrase',))  # 09
+G.rule('Story',  ('Phrase', 'and', 'Story'))  # 10
+G.rule('Story',  ('Phrase', 'but', 'Story'))  # 11
+G.rule('Start',  ('Story', '.'))  # 12
+for _ in range (0, 5):
+    print(G.generate())
+
+# the cat bit the boy .
+# the cat kissed the dog and the boy chased the boy .
+# the cat chased the dog and the girl bit the boy but the girl chased the cat .
+# the girl chased the dog .
+# the boy kissed the girl and the cat kissed the girl .
+
+print()
+print()
+
+# 
+# 
+
+J = Grammar(1453)
+J.rule('Noun',   ('sentence',))
+J.rule('Noun',   ('walrus',))
+J.rule('Noun',   ('sky',))
+J.rule('Noun',   ('diamond',))
+J.rule('Noun',   ('Ottoman Empire',))
+J.rule('Verb',   ('is',))
+J.rule('Verb',   ('fanned',))
+J.rule('Verb',   ('generated',))
+J.rule('Verb',   ('hit',))
+J.rule('Phrase', ('the', 'Noun', 'Verb', 'the', 'Noun'))  # 08
+J.rule('Phrase', ('Noun', 'Verb', 'the', 'Noun'))
+J.rule('Story',  ('Phrase',))  # 09
+J.rule('Story',  ('Phrase', 'and', 'Story'))  # 10
+J.rule('Story',  ('Phrase', 'but', 'Story'))  # 11
+J.rule('Start',  ('Story', '.'))  # 12
+
+for _ in range(0, 5):
+    print(J.generate())
+
+# the walrus is the sentence and the diamond generated the walrus .
+# the walrus generated the walrus and the walrus generated the sentence but diamond hit the sentence .
+# sentence fanned the Ottoman Empire .
+# the sky hit the diamond and sky is the sentence but the sky fanned the diamond .
+# the walrus generated the diamond and the diamond generated the Ottoman Empire but the sky generated the sentence .